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Papyrus generate Java code from State Machine Diagram [message #1810428]

Sat, 10 August 2019 19:57

Dionisie Rosca

Messages: 2
Registered: August 2019

Junior Member

I create a state machine diagram following this steps:

1. Build your class diagram (at least one class)
2. In the outline view, right click on the class that should get behaviour defined with a state diagram
3. Select "Add a diagram -> Create a new state machine diagram", the new SM diagram opens
4. Select StateMachine in the palette
5. Click or click-drag into the state machine diagram to position the state machine
6. Start entering states and transitions into the state machine

When I try to generate java code from the class diagram it works fine, but when I try to generate from state machine diagram i got this erro:

No classes or packages produced from the transformation. Nothing is generated.

I don't understand what it's wrong, please help.

Thanks

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Re: Papyrus generate Java code from State Machine Diagram [message #1810850 is a reply to message #1810428]

Tue, 20 August 2019 15:26

Ansgar Radermacher

Messages: 461
Registered: March 2011
Location: Paris Saclay, France

Senior Member

Hi,

state-machine code generation is currently only supported for C++, not for Java. The error message is caused by invoking the generator on the diagram and not on the class (e.g. via the model explorer). If you do the latter, you'll get the code for the class without state-machine support.

Sorry

Ansgar

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Re: Papyrus generate Java code from State Machine Diagram [message #1818396 is a reply to message #1810850]

Fri, 13 December 2019 21:08

Leonard Reder

Messages: 1
Registered: December 2019

Junior Member

Hi,

I am just starting to look at Pyparus as a replacement for the MagicDraw commercial CASE tool. I am interested in creating and generating C++ code from UML Statecharts. We have our own C++ code generator that accepts MagicDraw XMI which we will change if Pyparus proves to be a good option. A couple quick questions:

1. I was able to create a state diagram but I have two problems. First I cannot figure out how to properly insert Guard conditions into the model and diagram. All my guards are either a simple C function call or a simple C expression with some variables. If someone could send me a procedure or pointer to a how to manual for state machine modes and diagram creation in Pyparus that would be create. I know this should not be this hard.

2. I need to create activities in my statecharts as well. My activites are just function calls. Also how to do multiple activities within the entry/exist actions of states?

Thanks for any reply. I would really appreciate it. The Pyparus looks like a good alternative in making if I can get into it.

Regards,

Len

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Re: Papyrus generate Java code from State Machine Diagram [message #1818483 is a reply to message #1818396]

Tue, 17 December 2019 08:49

Yoann Farré

Messages: 235
Registered: November 2017

Senior Member

Hi,

1. I don't have a link or a pointer to a doc on that but I can describe the way I use to add guard condition in the transition of a state machine.
a: Select the relevant transition
b: In the "Guard" field, click the "+" button and select a type of constraint. I mainly use "Interaction Constraint".
c: Then you can add a "Specification" by clicking on "+" button.
d: If you add code, chose OpaqueExpression and then select the language you want to use (C++ I mean)
e: Add your code in the body for this language.

I generate code every day using this way.

2/ To add entry or exit behavior:
a: Select the relevant state
b: Add a behavior through the "+"button in the field Exit, Entry or DoActivity
c: Chose OpaqueBehavior
d: It's the same principle than OpaqueExpression to fill the body

HTH.

Regards.
Yoann.

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Re: Papyrus generate Java code from State Machine Diagram [message #1818952 is a reply to message #1818483]

Fri, 03 January 2020 09:20

Ansgar Radermacher

Messages: 461
Registered: March 2011
Location: Paris Saclay, France

Senior Member

Hi,

a quick way to edit transitions is to use the embedded xtext editor, which can be invoked by pressing "F2" on a transition.
However, the text editor does not work well for constraints, as it produces opaque expressions with "Natural Language" as language tag. While you can change the tag manually (to C++) after editing, the editor won't show the constraint, if you call it again (it looks for "Natural language" expressions only).

Ansgar

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